JPS58207834A - Stator core for motor - Google Patents

Abstract

PURPOSE:To reduce the magnetic loss of a bonded part of an annular stator core for a motor by radially dividing the core into a plurality of core segments, forming projections having recesses on the outer periphery of the surface of one core segment and recesses on the outer periphery of the surface of the other core segment, and engaging reversely to one another the projections with the recesses. CONSTITUTION:Projections 9, 9' which are projected radial outside of divided core segments 12, 12' divided, for example, in a plurality, e.g. two segments radially from an annular iron plate formed with recesses 10, 10' in the vicinity of the surfaces 8 of the core segments at one of both ends of the outer peripheral sides of the surfaces 8 of the cores 12, 12', are respectively formed on the core segments 12, 12', and raised parts 11, 11' are formed on the outer periphery on the outer peripheral edge of the other divided core segment 8 in the vicinity of the core segments 8. In this case, the distances between the centers and the divided surfaces of the recesses 10, 10' and the raised parts 11, 11' are equally formed, and the shapes of the recesses and the raised parts are formed similarly in such a manner that the raised parts 11, 11' are slightly smaller. The recess 10' are respectively engaged in opposite combination of the core segments 12, 12', and the two core segments are then bonded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an iron core suitable for joining a flat moving stator in which the core is divided into a plurality of parts and wound, the divided surfaces are joined and the outer periphery is molded with resin. It is something.

LJL encouragement 11! i1 Fixed the winding of the constantor F, @ for each slot of the iron core! When wrapped around the iron part, the height of the coil end can be increased by 1
It is a well-known fact that the length can be shortened to J, but in order to apply a so-called toroidal winding to the joint part of the annular core, (t-1, toroidal winding, 4) is required.

For this winding wire 4, after setting the wire storage ring so as to intersect with the straight winding body, the required wire is evenly wound around the +tH wire ring, and then the wire storage ring is reversed. t, while pulling out the stored tV wire, wind it on the wire-wound body, but the work efficiency is extremely slow, and the winding speed is also slow, so it is difficult to It is not suitable for 40 windings such as L, auxiliary, and other types of rotating electric wires that require multiple windings.

As an alternative to the toroidal winding machine, it is possible to divide the iron core, which is a 1u winding body, and apply flyer winding, which is always performed once on each divided iron core (51-
98031, etc.

According to this method, except for joining the ρj iron core,
Toroidal winding, which has been difficult in the past, can be done easily and at high speed.

However, various problems arise with regard to joining the iron cores. In other words, the usual method that can be considered is to divide the cores 1 and 2 as shown in Figure 1, and provide a concave and convex portion 3 at the junction of the cores 1 and 2 to engage them, but this method requires a gap in order to engage the opposite sides. , this gap becomes magnetic resistance and gives a shadow to the Iu dynamic traction characteristics. Furthermore, if attention is not paid to the i:i' principle of dimensional accuracy between the two, there are important problems such as variations in quality.

This method could not be adopted in the case of a small JJ1 core for dynamic forming, in which the width of the 411 chip part was small, because the uneven part 3 could not be avoided due to the dimensions.

Another method is to use a protrusion 6 on the outer periphery 81S of the dividing surface 4 and fix it with a melting pane 6, as shown in FIG. Although this method has the advantage of making the dividing surface 4 smooth and reducing the magnetic loss, the winding (see figure)') may be burnt due to the fire during welding, and the core insulation may deteriorate. Along with performance quality issues,
Larger problems include the need for welding equipment and the need to be particularly careful in management when producing.

In addition, as yet another method, it is possible to bond the flat parts with an adhesive, but although the advantage of making the dividing surface flat is the same as in the case of welding, this time the adhesive If stock management, coating work management, and curing/drying conditions are not properly controlled, there will be wide variations in adhesive strength, and equipment may be required to cure and dry 1 to 1 product, or continuous drying may be required. They have problems such as not being able to move the line.

The present invention aims to solve the above-mentioned problems and provide a split core for a one-torque rotating rotor that is easy to join and can minimize magnetic loss at the joints.
'I will be explained.

FIG. 3 shows one piece of an iron plate divided into two, which is the key to the present invention. In the figure, an annular iron plate 7 divided into two
is partially attached to one of both ends of the outer diameter side of the dividing surface 8.
131 and protrudes outward in the western direction so as to be equipped with t)'L on the outside 1
- The protrusion 1 and 9 are shaped like 1. Also, this protrusion・1
A concave portion 1o is provided in the vicinity of the ρj plane 8 of the portion extending outward from the dividing plane 139. At the outer edge of the other 5)' printing surface 8, a convex portion 11 is provided on the outer periphery near the dividing surface 8. And this concavity;lHo
The distance between the center of each of the convex portions 11 and the dividing surface is in order, and the shapes of the convex and convex portions are similar, and the convex portion 11 is formed to be slightly smaller.

The iron plate 7 having the following configuration is placed in the same direction, that is, the protrusion 9
FIG. 4 is a perspective view of the split core 12 formed by aligning and stacking the cores. FIG. 5 shows a fixed Ji iron core made by combining two of these divided iron cores 12 and 12 degrees in opposite directions. As is clear from the figure, the recess 74110 and the protrusion 11'
The convex portion 11 and the concave portion 10° are engaged with each other, and the two divided iron cores 12 and 121t are in L contact.

At this time, the interlocking method is as shown in Fig. 6, by adjusting the protrusion height in the stacking thickness direction (axial radial direction) as shown by the arrow, and adjusting the protrusion height from the direction perpendicular to the dividing surface 8. There is a method of pushing in as shown by the arrow in Figure 45.

In the case of this example in which the iron plates are stacked in the same direction, the occlusion can be six teeth regardless of which occlusion method is used.

Next, as another method for assembling the iron core, when laminating the iron plates 7, the direction of the iron plates 7 is reversed in the thickness direction j4. The configuration of the split core 12 made from this collar is shown in No. 71Δ. In the case of configuration 4 in the figure, the core engagement method is 2.
The two split iron cores are placed with their split surfaces facing each other, and are pressed together from both sides with force in a direction perpendicular to the split surfaces. For this reason, the height of the convex portion 11 must be such that the opposing iron core can ride over it by the pushing pressure.

Alternatively, as another assembly method, the H41 iron plates are stacked in the opposite direction for each thickness of the stack, and the resulting iron cores are pressed and engaged in the same manner as in Section 11iI. In this case, when stacking iron plates, if the stacking direction is reversed for every even number of stacked layers, an iron core with the same number of protrusions on both sides in the dividing direction can be obtained.

The above-mentioned stator core is formed by resin molding after winding is applied and the divided surfaces of the divided core are brought into contact with each other.

According to the present invention, the following effects can be achieved on hemorrhoids.

(1) Regardless of the unevenness provided on the split surface when joining the split core, 17. Since flatness can be ensured, magnetic loss can be reduced.

(2) Since no flame is used for welding the split i1, there is no need for welding equipment, productivity is improved, there is no winding burnout or deterioration of the core insulation due to flames, and the workplace is Safety is also improved.

(3) There is no need for adhesive bonding and curing and drying time in the warehouse, making it possible to create a continuous production line. At the same time, there is no need for adhesive application work, and adhesive stock management, application management, curing drying, etc. There is no need for management or environmental management of the workplace.
becomes.

(4) There is no need to hold the joint surfaces of two split cores together for a moment like when bonding, and H'Sk i + Jf7 and JL↓ for that purpose are no longer necessary. .

(6) For selecting the dimensions of the concave and convex parts to be interlocked, ]:
In this case, the occlusion between the two is sufficiently dense, and therefore the joint area Ω is increased, and a reduction in magnetic loss can be expected.

(6) Improvements in winding work can be expected, such as by holding the protrusion with a chuck on the winding machine.

According to the present invention, not only can the joint of the split cores be made in one touch by occlusion, but also there are many improvements as described above compared to the conventionally considered methods. , excellent price +! You can assemble PL Chichishin.

[Brief explanation of the drawing]

Figure 1 is a partial 11th view of a conventional example of core joining using unevenness, Figure 2 is a partial 11 side view of a conventional example of protrusion tip welding,
Fig. 3 is a diagram of the iron plate 17 according to the embodiment K of the present invention, Fig. 4 is a perspective view of the divided iron core according to the embodiment of the present invention, and Fig. 6 is a diagram of the slot of the embodiment K of the present invention, with illustrations omitted. Fig. 61 is a perspective view showing another joined state using the split core according to the embodiment of the present invention;
The figure is a 111-state diagram of a divided iron core according to another embodiment 1 of the present invention. 7... Iron plate, 8... Divided surface, 9...
...Protrusion, 1o...Concavity, 11...
・Protrusion, 12, 12'...Split core. Agent’s name: Ben” 1! Toshio Nakao and 1 other person Figure 1 #! Figure 2K tlNs°Figure 4Figure 5Figure 6Figure 7

Claims (2)

[Claims] (1) An annular stator iron plate is divided into a plurality of parts in the radial direction, and a protrusion that protrudes outward in the radial direction is provided on the outer periphery of one of the divided surfaces of the divided iron plate so that a part is located outside the divided surface, and
1) A recess is provided in the extension of the outer diameter line of the iron plate of the part located outside the dividing surface of the protrusion, and a recess is provided at the outer periphery of the other dividing surface at a position corresponding to the recess. A stator core for an electric motor, in which a divided core is constructed by laminating iron plates provided with small convex portions in the same direction, and the divided cores are assembled by engaging each other in opposite directions using the number of divided cores necessary to restore the annular shape. (2) In the case where the steel plate is divided into two parts based on the diameter, the divided iron cores, which are stacked with the steel plates facing in opposite directions for every even number of equal parts of the stacking thickness, are stacked in opposite directions. 1M stator core (3) of the electric motor according to claim 1 assembled by interlocking in the direction of the lamination of the iron plates f% of the lamination thickness
Or, the stator core of 1a motion described in the second patent claim, which is written in the opposite direction every three parts.